Camera



' J. A. McGRATH.

CAMERA.

APPLICATION FILED MAR-4,1919.

Patented Jan. 31, 1922.

* UNITED STATES PATENT OFFICE,

JOSEIBH A. Iceman, OFNEW YORK, N. Y.

CAMERA.

To, all whom it Be it known that I, JOSEPH A. MCGRATH,

a citizen ofthe United States, residing at New York, in the countyof New York and State of New- York, have invented certain newanduseful Improvements in aCamera,

K of which the 'following is a specification.

This invention, relates to. im rovements in v cameras and more particularly to that-type v the exposures are successively ma e and'the:

of camera utilizing a rollfilm u' n which object of the invention is to'provide means preventing} the doubleexposure of any particularlsection' of the film by repeatedoperations of the shutter. V

Another objectl of the invention is the provision of a device of this character which may be appliedto conventional types of folding'cameras and is controlled directly by the turning key and effectively locks'the' shutter against more than a single opera tion until the ke is. revolved and a new section of film, (l opening of the camera for exposure. Y

' With these. and other objects in view as will appear as the description proceeds, the

. invention comprises theirnovel features of construction, combination of elements and arrangement of parts wh ch will be more fully described in the following specificaclaims ap ended hereto. 7 v

'In the awing:

tion and-set forthwith particularity in the:

Figure 1 representsfa' ifront elevation of a camera having the invention applied to use,

Figure 2 represents an enlarged fragmentary front elevation, partly in section, of

the lens board, showing the shutter release lever depressed and thelooking mechanism therefor set,

Figure 3' represents an enlarged fragmentary front elevation, partly in section, of the lens illustrating the locking lever in its release or inoperatlve-position' such as it as-' sumes subsequent to the operation of the winding key,

Figure 4 represents'a fragmentary side 7 elevation of the camera, and

Figure 5 represents a detail sectional view through the housing receiving the upper v terminalof the locking lever, the same beisposed in 'the' exposure Specification of Letters Patent. Patented Jan, 31, 1922,: Application filed March 4, 1919. Serial No. 280,598.

ing taken on the line 55 of Fig. 3, looking forward and relativelysmall terminal with the verti'cally'adju'stable lens board 7 which latter is'mounted upon a track 8 carried by the hinged front 9. The lens board 7,supports the shutter 10' and lens 11 and the shutter is equipped with a well known type of pivoted and depressible shutter release lever 11 also operable by a shutter releasing cable 12 connected with the case 'of the shut-- ter mechanism 10.'

The opposite terminals of the relatively long narrow body 5 are provided with film spool receiving chambers and the chamber' at the terminal ofthe body receiving the film receiving spool is provided with a well known type of ,turning key 13 which is adapted to engage the terminal of the film' spool to establish connection therewith whereby the rotary movement of the key is transrmttedoto the spool to wind the film.

thereon and successively present sections of the film behind the exposure opening in the camera for exposure. p

A lever 14 is pivotally' secured at 15 to the front of the lens board or lens support 7 and pivotally supports at its lower ter-- minal a substantially U-sh-aped {pawl 16 which is secured to the lever bya pivot pin 17 and is normally retained in engagement, at one terminal, with the lever 14: by a leaf spring 18. The opposite terminal of .the pawl is normally engaged in the path of the movement of the shutter release lever 11 and prevents a repetition of the operation of the release lever subse uent to the proper exposure of any particu ar section of the sensitized film. It is evident that the construction and arrangement of the pawlis such as to permit the return movement of the release lever 11 subsequent to its depression and the consequent operation of the shutter but after the return of the release lever the pawl '16"isprojected behind the lever thereby'preventi'ng successive operation thereofuntil the. lever 14: is reset by.

operation of the filmwinding key'as'will be through diagonal f aperturei 23 formed in 1 one offthef'sideiwall's of the camera body 5 and "is fastened at? its opposite terminalslby f bracketsQt to thej'top of the lens support 17 and the side wjvajllfof the camera body car rying" hejtuin ng key Yfl i e abl isslidably*'supportecl "inrth'e housing'22'f rand ofne terminal: thereof is normallyiand resilient-1y disposed in thepathof 'lth'e tur'nQ in'gfkey l 3"'and its arrangement :13 such that When the keyi'ii r tata v n the d e i O guref'4 to 'windjjthe film, the e moved longitudinally; through the h'o'usingj22 Fa'nd releasejthe lock; ing lever '14; as 'will' hereinafteriap'pear, and

Will be returneclto normalp'osition', upon the continuous turning movementofthekey, aftertheius'ualmannenof suchgdevicesj 1 i V 7' The opposite terminal of the'gcable '25 is extended: throug'lij aperture formed on one endz iv'valgl "of; thehoujsing ZO "and isldisposlecl f in 'thejpa thlof the upper angularfterminal r 19 offthefloeking; lever 'Iland j operated to" aut maticall fshi'ftthe latter! to inoperative. pbsi'tion shown, n Figure 2jwhen the turn: r in'g'ikey 13- isi actuatcl to wind a'seotionffQf-f theexposedzsensitized filmsi Y i thejarlfdivin cable 25 will the lens board or support 7. A substantial l ygV-shaped spring 21 is confined between i the upper terminal of the lever and the top 7 of the housing 20 and its"proi n'inent medial" portion serves as a braking device to maintainthe lever 14 infits operativeor looking:

position, as show n ig s'l ands; 7

'In operation; the initialfturning new;

ment .of the key ;13--necessary to ivind'ftlie terminal of the jsensiti'zedjfilni thereon pro-9' cluoesi alongitudinal movement of the'eab'lei 25 intthe directiono'f the housing 20 and'the: terminal} oi the l cable bearing} againstithef locking leverl l rocks the latter tofthe imp-g V e'rative position ill'ustratedfin"Figure 2,1th'e,

prominent 'medial 'lpo'rtion ofjIthe spring 21 .L acting to inaintain the lever'in its inoperae. tive' positiom"after vthe ret'urniofthe cab le;to its normally perative positionin the path: or" {turning- 'movemelit ofitlie: key: 13; Then so positioned,';the l6iisf disposediout 'ofl 'tliepath of the'lshutter(release'lever"11 and j j the latter may be readily depressed to .pro- I diice an operationlof the shutter mechanism 7 V whichl-willji'obviously eXpo'seaQsection of the Depression ofthe shutterlrelease lever V 7 incident t e an operation-of the, shutter-free turns the lever 14 to its initial operative .po

sition and duringthe automatic return of vexposure opening in the camera.

duringthei'aotuation thereof;

against the'action of the spring 18 and, subsequent tothe' 'movement of 'the lever'zpast V the pawl, the lattersprings' b a'ck to its initial position illustrated'in Figure'2 and efiece tively locks the;shutter release lever against further operation until the winding key 13 .iseaotuated to move a new-and unexposed section of the film in position behind the What I claim is:

movementfo'f ldimea i t f pe et v rb n vhe by to permit th'e"operationpifthejshiitter' actu 'a'ting leveryand an extension carried byf'the 1 a e-mere; a :film spool turning key and a shutter actuating lever, means 'nor-,

mally acting to preventithe operationt'of the actuating lever; yielding -means for retaining said firstmentionedfineans fin operative pp' ti i meansi tu d by t i 4 theikeyfto shi'ft tlie "firstmen actuating" lever and adaptedto ,iulm said first mentioned ineans to epgmc'y position 2'. "In 7 acamera including a 'shutter iiieha 'af lens hoard-"supporting thefshutterj mechani m, an actuatingflevenfdnthe h t; r V V e c amsm, a lever annpivotallymouna' ed on :said lene "board toton'e "side ofjthe lens v l n l 'fl heif a a Pew a e Lai 5 lever arm and normallyfin locking engage- V ment with saijd actuating-lever; a" Sp ol-i I ni g yt e s icb i bll d"fbyr the tum? ing" key for'shiftin'g theleveri arnn' to "move V V 1100, witlif'said actuatingfleverfancl an! extension formed withsaicl actuatingleverfor return- I V s d; l e rrila i the? WWI ied thereby; to normally operative position, the i pawl being; re-fengaged biy said; actuating e i in i :reerni'movem t; b0 norma ly,"

thef pawlfthereon' past "locking en a eme t inoperative posit ';f fA" amere; h l ing e b ii e lends: Y 1

board l supported thereby; a}shu'tter enp.

ported uponthe lensfboardj andfineluding a Shutter ,release lever, a supplementary jlever p ote y s ppe tedfup ni t len boa d lcking pawl p yf c redito the-Sup;

to obstruct movement ofandiprevent 'op-j plementary lever andfmovable to apositionl 7 f 1'15 eration of the release lever, spring means frictionall'y holding the supplem'entary lever in 'o' 'era'tive ositlon a film s' 601 turnin P P. a

'key supportedbyfthejbody, and meanscon-* 7 position 'upon'opi' trolledfby the key to "shift" the supplementary, lever to' inoperative eration 'of thejturning key.

4. "camera; including a body;,alens, f 7 board supported thereby; a shutter calrriedf byfthe .lens board and including: a shutter releasetlever', a supplementaryrlevenaspring;

actuatedlpawl carried by onefendof the'sup plementaryf lever, permitting the return movement off the I shutter grelase"v lever Randi movablewith the supplementaryflever to a? necting the key with the supplementary lever whereby the latter is moved to inoperative position upon operation of the turn- 10 ing key.

In testimony whereof, I afiix my signature hereto.

JOSEPH A. MoGRATH. 

